You need OpenLDAP 2.3 for these settings to be found in the man page.
I'm pretty sure they don't exist as configurable options for slapd.conf
under 2.2, either. You can probably tweak the 2.2 source to do the same
stuff though.

I'm trying to stick with the .deb's for ease of maintenance, so I'll have
to work around this another way.

If you like, I can give you a list of reasons as to why this is a poor
decision. :)